Drying apparatus.



No. 68I,942. Patented Sept. 3, I90I.

C. WHITE.

DRYING APPARATUS.

4(Apzlnntiion led Dec. 3, 1900,) (No Model 2 Sheets-Sheet l.

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Patented Sept.l 3, 190|. C. WHITE.

DBYING APPARATUS.

(Application 1ed-2Dec. 3, 1900.)

2 Sheets-Sheet 2.

(No Model.)

Witnesses. 1Q/. fw/H Inl/entor.

UNITED STATES PATENT v@Erica CARL WHITE, OF NEWHOPE, KENTUCKY.

DRYING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 681,942, datedSeptember 3, 1901.

Application led December 3, 1900. Serial No. 38,486. (No model.)

T0 @ZZ "tu/"1,0m, it may concern:

Be it known that I, CARL WHITE, a citizen of the United States, residingat Newhope, in the county of Nelson and State of Kentucky, have inventednew and useful Improvements in Drying Apparatus, of which the followingis a specification.

My invention relates to an apparatus for drying or desiccating slop,refuse from grain distillation, and similar products in order to reducesuch products to the condition of a dry meal for convenience oftransportation, 85e., and distribution in such fornifor use as feed forstock, dac.

My invention consists of the parts and the constructions andcombinations of parts substantially as I will hereinafter describe andclaim.

A preferred form of apparatus is illustrated in the accompanyingdrawings', in which- Figure l is an axial section, represented in sideelevation, of a horizontal drum provided with a hot-air jacket andchannels for the maintenance of heat and a current of hot air to carry othe vapor-ized moisture and an agitating and propelling apparatus formoving the material. Figs. 2 and 4 are opposite end elevations, and Fig.3 an intermediate cross-section, of the same apparatus.

The containing vessel illustrated is ahorizontal cylindrical drum A ofappropriate length xedly supported upon pillars and end walls A.

The containing vessel A is composed of outer and inner shells a a?,between which shells is a continuous spiral partition a3 extending fromend to end of the drum, converting the inclosed space between the shellsand successive convolutions of the partition into a continuous spiralchannel surrounding the inner shell. The spiral channel a4 thusconstituted opens at one end into an admission-pipe h2, connected to asource of supply of hot air, (not shown,) and at the opposite end isconnected to tube c, which is carried exteriorly to the drum A to andconnects with a rotating hollow Vshaft D, which projects through thedrum and is provided with a suitably-packed joint d. hollow shaft D isclosed and supported by an axial pintle d', projecting through the endof the drum, supported in a journal-bracket d2 Atthe opposite end thethe end of the drum, and within the zone covered by the shield the shaftD is perforated, as at zr. At the outer end the shield D rotates inclose proximity to the end wall of the drum and at the opposite end iseutirely open to the interior of the drum. Anv exit-mouth b', providedwith an exhaust-fan, (not shown,) leads outward from the interior of thedrum. The hollow shaft D is provided with radial arms e, the outer endsof which, arranged in close proximity to the shell CL2, are spiralblades E, all having the same spiral inclination in substantialparallelism. The drum is provided at the top at one end with areceiving-mouth b3, through which the semiliquid matter is fed to thedrum, falling first upon the shield D and thence around the same to theinner bottom of the drum. A

discharge-mouth b4 is provided at the opposite end at the bottom',through which the dried material is discharged. Suitably-controlledopenings a5 a6 open into the channel n.4 to admit cool air, as may benecessary. The hollow shaft D at its receiving end may be provided Witha suitably-turned annulus and carried thereby upon friction-rollersproperly disposed, as at y.

The mode of operation is as follows: The pipe b2 being connected to asuitable supply of hot air, the exhaust-fan in exit-pipe h' is set inmotion. The first effect of the exhausting process is upon the interiorof the drum A, and (supposing the openings h2 and b3 to be closed) thecondition of vacuum thus produced is supplied through the apertures xofhollow shaft D, and the hollow shaft in turn is supplied throughconnecting-pipe c and the spiral channel a4 from the pipe b2, leading tothe source of air-supply. Thus the inner shell a2 is completelysurrounded by hot air, and the hollow shaft D is likewise filled withthe same and the shield Dl heated by the same, and the current of airthus utilized to heat the apparatus is then drawn outward through theinterior of the drum to absorb and carry od vapors engendered by theheat thus applied. The semiliquid material is IOO fed in through thereceiving-aperture b3, falling first on and over the shield D', by whichit is spread into a thin sheet and heated. It falls thence to thebottom, where it is caught, agitated, and partially carried upward bythe blades E, and the drippings fall upon and over the hollow shaft D,while the material generally is slowly moved toward the discharge-mouthbt The parts are so proportioned and the heat so tempered that thematerial is thoroughly dried and its vapors carried olf before reachingthe discharge-mouth, through which it falls a dried meal.7 The incomingmaterial forms a seal for the inletmouth b3, and the accumulation ofmeal at the discharge-mouth b4 forms the desired seal at that point, andthe operation is continuous under suitable regulation of the necessaryconditions.

I claim as myinvention and desire to secure by Letters Patent of theUnited States- 1. In a drying apparatus, the combination of a jacketeddrum; an axial hollow rotatable shaft; means connecting with one endpor` tion of the drum and admitting hot air thereto; a pipe or passageconnecting with the opposite end portion of the drum said pipe orpassage ,having its opposite end connecting withone end of the shaft; aspiral conveyer carried by the shaft; and a pipe or passage at the endof the drum opposite to the firstnamed pipe or passage and through whichvapors may be exhausted from the interior of the drum.

2. In a drying apparatus, the combination of a stationary jacketed drumhaving a hotair entrance connecting with the jacket-space near one endof the drum, and a dischargepassage from the interior of the drum, nearthe opposite end thereof a hollow rotatable shaft, having means forconveying the material through the interior of the drum; a pipe orpassage connecting the jacket-space of the drum directly with the shaft;and a pipe or vpassage leading from the interior of the drum and throughwhich the air is exhausted from the shaft and the vapors from the drum.

3. In adrying apparatus, the combination of a drum; means for heatingthe same; ahollow rotatable shaft; means carried by the shaft forconveying material through the drum, said shaft having air-outlets nearone end; an inclosure for said outlets; and means whereby the vapors maybe exhausted from the drum.

4. In a drying apparatus the combination of a drum and an axial hollowrotatable shaft; means whereby the drum may be heated and the heatmedium conveyed to the interior of the shaft said shaft having outletsnear one end; a shield or casing surrounding said outviding and heatingit; and means for conveying the material through the drum, substantiallyas described.

6. In a drying apparatus the combination of a drum and meanswhereby thesame may be heated; a hollow rotatable shaft adapted to receive heatproducts said shaft having openings in one end portion; and ashieldsurrounding the last-named portion of the shaft and upon which thematerialiirst falls and by which it is spread into a sheet and heated;and means for conveying the material through the interior of the drum.7. In a drying apparatus a jacketed drum having a spiral passage throughit said passage connecting at one end with a source of heat, and havinga discharge at the opposite end; a hollow shaft and means for rotatingthe same; means connecting the discharge end of the spiral passage withone end of the shaft said shaft having heat-outlets near the oppositeend; a shield surrounding the lastnamed end of the shaft so as toinclose the outlets and connect the interior of the shaft with theinterior of the drum; means Whereby the vapors may be exhausted from theinterior of the drum; and means for conveying the material through thedrum.

8. The apparatus for drying still-slop and similar semiliquid material,embodying a jacketed drum, adapted to be heated, an axial IOO hollowshaft opening into the interior of the drum and rotating therein',radial arms fixed to the shaft and blades carried upon the arms inproximity to the curved wall of the drum, a pipe connecting thejacket-space of the drum directly with one end of the shaft said shafthaving air-outlets in its opposite end portion, an inclosure for theseoutlets, and means whereby the air and vapors are eX- hausted from thedrum.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses. Y

CARL WHITE.

VVit-nesses:

L. M. HosEA, CRAs. HERBERT JONES.

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